タケカワ シュンヤ   Takekawa Shunya
  竹川 俊也
   所属   神奈川大学  工学部 物理学教室
   職種   助教
言語種別 英語
発行・発表の年月 2019/01
形態種別 学術雑誌
査読 査読あり
標題 Indication of Another Intermediate-mass Black Hole in the Galactic Center
執筆形態 共著
掲載誌名 Astrophysical Journal Letters
掲載区分国外
出版社・発行元 Astrophysical Journal Letters
巻・号・頁 871(1)
著者・共著者 Takekawa S,Oka T,Iwata Y,Tsujimoto S,Nomura M
概要 © 2019. The American Astronomical Society. We report the discovery of molecular gas streams orbiting around an invisible massive object in the central region of our Galaxy, based on the high-resolution molecular line observations with the Atacama Large Millimeter/submillimeter Array. The morphology and kinematics of these streams can be reproduced well through two Keplerian orbits around a single point mass of (3.2 ± 0.6) ×10 4 M o . We also found ionized gas toward the inner part of the orbiting gas, indicating dissociative shock and/or photoionization. Our results provide new circumstantial evidences for a wandering intermediate-mass black hole in the Galactic center, suggesting also that high-velocity compact clouds can be probes of quiescent black holes that abound in our Galaxy.
DOI 10.3847/2041-8213/aafb07
ISSN 20418205
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